28 lines
1.0 KiB
JavaScript
28 lines
1.0 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var constants;
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(function (constants) {
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constants.typeOfFunction = 'function';
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constants.boolTrue = true;
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})(constants || (constants = {}));
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function bind(target, propertyKey, descriptor) {
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if (!descriptor || (typeof descriptor.value !== constants.typeOfFunction)) {
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throw new TypeError("Only methods can be decorated with @bind. <" + propertyKey + "> is not a method!");
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}
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return {
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configurable: constants.boolTrue,
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get: function () {
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var bound = descriptor.value.bind(this);
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// Credits to https://github.com/andreypopp/autobind-decorator for memoizing the result of bind against a symbol on the instance.
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Object.defineProperty(this, propertyKey, {
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value: bound,
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configurable: constants.boolTrue,
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writable: constants.boolTrue
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});
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return bound;
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}
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};
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}
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exports.bind = bind;
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exports.default = bind;
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